Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c132c565d456870…

MALICIOUS

PDF

83.3 KB Created: 2021-03-29 22:47:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1bd250c0eec9ab87faa0dd73c17d53a7 SHA-1: 98ad97213189e5f075134a1c4ebbeafb8ee23056 SHA-256: 5c132c565d4568700f8ad61279cd7e30408a0757a2098e7f990a28a67fe5b1d9
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://fokemale.ru/strik?utm_term=how+much+horsepower+does+a+2019+gsxr+750+have PDF link annotation
    • https://cdn.sqhk.co/xewumoxu/gfGhbie/destiny_s_child_cater_2_u_lyrics_traduction.pdfIn PDF document text
    • http://tetoxukipim.getenjoyment.net/where_do_i_find_the_network_security_key_on_a_netgear_router.pdfIn PDF document text
    • https://jaluwaxigesife.weebly.com/uploads/1/3/4/6/134640648/kovotofetijase-majuku-gozufuzekatope-wojafoti.pdfIn PDF document text
    • https://cdn.sqhk.co/vavewiminiv/jgihBhg/listen_to_tennessee_titans_game_live.pdfIn PDF document text
    • http://tigobari.iblogger.org/watanutagebi.pdfIn PDF document text
    • http://fajufoturesu.sportsontheweb.net/24857980703.pdfIn PDF document text
    • https://cdn.sqhk.co/potasuregoz/WIifgjd/microsoft_to-_do_list_task_reminder_installer.pdfIn PDF document text
    • https://cdn.sqhk.co/juzurupivepo/hcw2hcz/amazing_shark_hunting_shark_games.pdfIn PDF document text
    • https://rasuvore.weebly.com/uploads/1/3/4/5/134523398/aaa455b456335f.pdfIn PDF document text
    • https://cdn.sqhk.co/sitopizol/1gfjhii/how_far_i_ii_go_tiles_hop_beatles.pdfIn PDF document text
    • http://sefegusekepuxa.mypressonline.com/secrets_aleatha_romig.pdfIn PDF document text
    • https://kibugaduxabe.weebly.com/uploads/1/3/4/5/134510017/mavesox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sesijesule/pdf_to_word_converter_paid_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/automation_testing_software_free.pdfIn PDF document text
    • http://girofili.myartsonline.com/which_word_does_not_belong_delicate_frivolous_illumination_kindle_opaque.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/8819068213.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/coordinating_conjunctions_and_subordinating_conjunctions_worksheets.pdfIn PDF document text
    • http://moborudazijom.epizy.com/bsc_chemistry_books_download.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10523 6324 bytes
SHA-256: 85008425608de48b56e3265440c57ed982fad07e718679a6ed8dfcd1b10cb02a
font_01_sfnt_off00011a9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A9F 10844 bytes
SHA-256: da26cff02942517b45530764c52cd8faaed274238c5d6df91457844ad08ffe6c

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